Of course it is very difficult to guess. With what you suggest, my question (and probably also OP's) would be: How do you select your "new coins"? There is such a high number of new coins coming out every month, it's impossible to invest in all of them and still expect a positive return in the long run, so there have to be some criteria you guys use for pre-selecting them...
For the last year I have been investing in new coins at the pre-sale stage: privat and seed round. All these investments are risky, but they allow you to buy a coin at a lower price. Not all investments bring profit, but such as Sidus, which brought more than x100, allow you to compensate for the loss from unsuccessful projects.